<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 7 Configuration Reference (7.0.42) - The Manager Component</title><meta name="author" content="Craig R. McClanahan"><meta name="author" content="Yoav Shapira"><style type="text/css" media="print">
            .noPrint {display: none;}
            td#mainBody {width: 100%;}
        </style><style type="text/css">
            code {background-color:rgb(224,255,255);padding:0 0.1em;}
            code.attributeName, code.propertyName {background-color:transparent;}
        </style><style type="text/css">
            .wrapped-source code { display: block; background-color: transparent; }
            .wrapped-source div { margin: 0 0 0 1.25em; }
            .wrapped-source p { margin: 0 0 0 1.25em; text-indent: -1.25em; }
        </style><style type="text/css">
            p.notice {
                border: 1px solid rgb(255, 0, 0);
                background-color: rgb(238, 238, 238);
                color: rgb(0, 51, 102);
                padding: 0.5em;
                margin: 1em 2em 1em 1em;
            }
        </style></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img src="../images/tomcat.gif" align="right" alt="
    The Apache Tomcat Servlet/JSP Container
  " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 7</font></h1><font face="arial,helvetica,sanserif">Version 7.0.42, Jul 2 2013</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap class="noPrint"><p><strong>Links</strong></p><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Config Ref. Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul><p><strong>Top Level Elements</strong></p><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul><p><strong>Executors</strong></p><ul><li><a href="executor.html">Executor</a></li></ul><p><strong>Connectors</strong></p><ul><li><a href="http.html">HTTP</a></li><li><a href="ajp.html">AJP</a></li></ul><p><strong>Containers</strong></p><ul><li><a href="context.html">Context</a></li><li><a href="engine.html">Engine</a></li><li><a href="host.html">Host</a></li><li><a href="cluster.html">Cluster</a></li></ul><p><strong>Nested Components</strong></p><ul><li><a href="globalresources.html">Global Resources</a></li><li><a href="jar-scanner.html">JarScanner</a></li><li><a href="listeners.html">Listeners</a></li><li><a href="loader.html">Loader</a></li><li><a href="manager.html">Manager</a></li><li><a href="realm.html">Realm</a></li><li><a href="resources.html">Resources</a></li><li><a href="valve.html">Valve</a></li></ul><p><strong>Cluster Elements</strong></p><ul><li><a href="cluster.html">Cluster</a></li><li><a href="cluster-manager.html">Manager</a></li><li><a href="cluster-channel.html">Channel</a></li><li><a href="cluster-membership.html">Channel/Membership</a></li><li><a href="cluster-sender.html">Channel/Sender</a></li><li><a href="cluster-receiver.html">Channel/Receiver</a></li><li><a href="cluster-interceptor.html">Channel/Interceptor</a></li><li><a href="cluster-valve.html">Valve</a></li><li><a href="cluster-deployer.html">Deployer</a></li><li><a href="cluster-listener.html">ClusterListener</a></li></ul><p><strong>Other</strong></p><ul><li><a href="filter.html">Filter</a></li><li><a href="systemprops.html">System properties</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>The Manager Component</h1><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li><li><a href="#Standard_Implementation">Standard Implementation</a></li></ol></li><li><a href="#Nested_Components">Nested Components</a></li><li><a href="#Special_Features">Special Features</a><ol><li><a href="#Persistence_Across_Restarts">Persistence Across Restarts</a></li><li><a href="#Disable_Session_Persistence">Disable Session Persistence</a></li></ol></li></ul>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>

  <p>The <strong>Manager</strong> element represents the <em>session
  manager</em> that will be used to create and maintain HTTP sessions
  as requested by the associated web application.</p>

  <p>A Manager element MAY be nested inside a
  <a href="context.html">Context</a> component.  If it is not included,
  a default Manager configuration will be created automatically, which
  is sufficient for most requirements, &mdash; see
  <em>Standard Manager Implementation</em> below for the details
  of this configuration.</p>

</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Attributes"><strong>Attributes</strong></a></font></td></tr><tr><td><blockquote>

  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Common Attributes"><!--()--></a><a name="Common_Attributes"><strong>Common Attributes</strong></a></font></td></tr><tr><td><blockquote>

    <p>All implementations of <strong>Manager</strong>
    support the following attributes:</p>

    <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">className</code></td><td align="left" valign="center">
        <p>Java class name of the implementation to use.  This class must
        implement the <code>org.apache.catalina.Manager</code> interface.
        If not specified, the standard value (defined below) will be used.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">distributable</code></td><td align="left" valign="center">
        <p>Set to <code>true</code> to ask the session manager to enforce
        the restrictions described in the Servlet Specification on
        distributable applications (primarily, this would mean that all
        session attributes must implement <code>java.io.Serializable</code>).
        Set to <code>false</code> (the default) to not enforce these
        restrictions.</p>

        <p><strong>NOTE</strong> - The value for this property is inherited
        automatically based on the presence or absence of the
        <code>&lt;distributable&gt;</code> element in the web application
        deployment descriptor (<code>/WEB-INF/web.xml</code>).</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxActiveSessions</code></td><td align="left" valign="center">
        <p>The maximum number of active sessions that will be created by
        this Manager, or <code>-1</code> (the default) for no limit.</p>

        <p>When the limit is reached, any attempt to create a new session
        (e.g. with <code>HttpServletRequest.getSession()</code> call)
        will fail with an <code>IllegalStateException</code>.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxInactiveInterval</code></td><td align="left" valign="center">
        <p>The initial maximum time interval, in seconds,
        between client requests before a session is invalidated. A negative value
        will result in sessions never timing out. If the attribute is not provided,
        a default of 1800 seconds (30 minutes) is used.</p>

        <p>This attribute provides the initial value whenever a
        new session is created, but the interval may be dynamically
        varied by a servlet via the
        <code>setMaxInactiveInterval</code> method of the <code>HttpSession</code> object.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">sessionIdLength</code></td><td align="left" valign="center">
       <p>The length of session ids created by this Manager, measured in bytes,
        excluding subsequent conversion to a hexadecimal string and
        excluding any JVM route information used for load balancing.
        The default is 16.</p>
      </td></tr></table>

  </blockquote></td></tr></table>


  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Standard Implementation"><!--()--></a><a name="Standard_Implementation"><strong>Standard Implementation</strong></a></font></td></tr><tr><td><blockquote>

    <p>Tomcat provides two standard implementations of <strong>Manager</strong>
    for use &mdash; the default one stores active sessions, while the optional one
    stores active sessions that have been swapped out (in addition to saving
    sessions across a restart of Tomcat) in a storage location that is selected
    via the use of an appropriate <strong>Store</strong> nested element.</p>

    <h3>Standard Manager Implementation</h3>

    <p>The standard implementation of <strong>Manager</strong> is
    <strong>org.apache.catalina.session.StandardManager</strong>.
    It supports the following additional attributes (in addition to the
    common attributes listed above):</p>

    <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">pathname</code></td><td align="left" valign="center">
        <p>Absolute or relative (to the work directory for this Context)
        pathname of the file in which session state will be preserved
        across application restarts, if possible.  The default is
        "SESSIONS.ser".<br>See
        <a href="#Persistence_Across_Restarts">Persistence Across Restarts</a>
        for more information. This persistence may be
        disabled by setting this attribute to an empty string.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">processExpiresFrequency</code></td><td align="left" valign="center">
        <p>Frequency of the session expiration, and related manager operations.
        Manager operations will be done once for the specified amount of
        backgroundProcess calls (i.e., the lower the amount, the more often the
        checks will occur). The minimum value is 1, and the default value is 6.
        </p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomClass</code></td><td align="left" valign="center">
        <p>Name of the Java class that extends
        <code>java.security.SecureRandom</code> to use to generate session IDs.
        If not specified, the default value is
        <code>java.security.SecureRandom</code>.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomProvider</code></td><td align="left" valign="center">
        <p>Name of the provider to use to create the
        <code>java.security.SecureRandom</code> instances that generate session
        IDs. If an invalid algorithm and/or provider is specified, the Manager
        will use the platform default provider and the default algorithm. If not
        specified, the platform default provider will be used.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomAlgorithm</code></td><td align="left" valign="center">
        <p>Name of the algorithm to use to create the
        <code>java.security.SecureRandom</code> instances that generate session
        IDs. If an invalid algorithm and/or provider is specified, the Manager
        will use the platform default provider and the default algorithm. If not
        specified, the default algorithm of SHA1PRNG will be used. If the
        default algorithm is not supported, the platform default will be used.
        To specify that the platform default should be used, do not set the
        secureRandomProvider attribute and set this attribute to the empty
        string.</p>
      </td></tr></table>

    <h3>Persistent Manager Implementation</h3>

    <p><strong>NOTE:</strong> You must set either the
    <code>org.apache.catalina.session.StandardSession.ACTIVITY_CHECK</code> or
    <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code>
    <a href="systemprops.html">system properties</a> to <code>true</code> for
    the persistent manager to work correctly.</p>

    <p>The persistent implementation of <strong>Manager</strong> is
    <strong>org.apache.catalina.session.PersistentManager</strong>.  In
    addition to the usual operations of creating and deleting sessions, a
    <code>PersistentManager</code> has the capability to swap active (but
    idle) sessions out to a persistent storage mechanism, as well as to save
    all sessions across a normal restart of Tomcat.  The actual persistent
    storage mechanism used is selected by your choice of a
    <strong>Store</strong> element nested inside the <strong>Manager</strong>
    element - this is required for use of <code>PersistentManager</code>.</p>

    <p>This implementation of Manager supports the following attributes in
    addition to the <a href="#Common Attributes">Common Attributes</a>
    described earlier.</p>

    <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><strong><code class="attributeName">className</code></strong></td><td align="left" valign="center">
        <p>It has the same meaning as described in the
        <a href="#Common Attributes">Common Attributes</a> above.
        You <strong>must</strong> specify
        <code>org.apache.catalina.session.PersistentManager</code> to use
        this manager implementation.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxIdleBackup</code></td><td align="left" valign="center">
        <p>The time interval (in seconds) since the last access to a session
        before it is eligible for being persisted to the session store, or
        <code>-1</code> to disable this feature.  By default, this feature is
        disabled.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxIdleSwap</code></td><td align="left" valign="center">
        <p>The time interval (in seconds) since the last access to a session
        before it should be persisted to the session store, and
        passivated out of the server's memory, or <code>-1</code> to disable
        this feature.  If this feature is enabled, the time interval specified
        here should be equal to or longer than the value specified for
        <code>maxIdleBackup</code>.  By default, this feature is disabled.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">minIdleSwap</code></td><td align="left" valign="center">
        <p>The time interval (in seconds) since the last access to a session
        before it will be eligible to be persisted to the session store, and
        passivated out of the server's memory, or <code>-1</code> for this
        swapping to be available at any time.  If specified, this value should
        be less than that specified by <code>maxIdleSwap</code>.  By default,
        this value is set to <code>-1</code>.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">processExpiresFrequency</code></td><td align="left" valign="center">
        <p>It is the same as described above for the
        <code>org.apache.catalina.session.StandardManager</code> class.
        </p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">saveOnRestart</code></td><td align="left" valign="center">
        <p>Should all sessions be persisted and reloaded when Tomcat is shut
        down and restarted (or when this application is reloaded)?  By default,
        this attribute is set to <code>true</code>.</p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomClass</code></td><td align="left" valign="center">
        <p>It is the same as described above for the
        <code>org.apache.catalina.session.StandardManager</code> class.
        </p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomProvider</code></td><td align="left" valign="center">
        <p>It is the same as described above for the
        <code>org.apache.catalina.session.StandardManager</code> class.
        </p>
      </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomAlgorithm</code></td><td align="left" valign="center">
        <p>It is the same as described above for the
        <code>org.apache.catalina.session.StandardManager</code> class.
        </p>
      </td></tr></table>

    <p>In order to successfully use a PersistentManager, you must nest inside
    it a <strong>&lt;Store&gt;</strong> element, as described below.</p>

  </blockquote></td></tr></table>


</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Nested Components"><!--()--></a><a name="Nested_Components"><strong>Nested Components</strong></a></font></td></tr><tr><td><blockquote>

  <h3>Standard Manager Implementation</h3>

  <p>If you are using the <em>Standard Manager Implementation</em>
  as described above, no elements may be nested inside your
  <strong>&lt;Manager&gt;</strong> element.</p>

  <h3>Persistent Manager Implementation</h3>

  <p>If you are using the <em>Persistent Manager Implementation</em>
  as described above, you <strong>MUST</strong> nest a
  <strong>&lt;Store&gt;</strong> element inside, which defines the
  characteristics of the persistent data storage.  Two implementations
  of the <code>&lt;Store&gt;</code> element are currently available,
  with different characteristics, as described below.</p>

  <h5>File Based Store</h5>

  <p>The <em>File Based Store</em> implementation saves swapped out
  sessions in individual files (named based on the session identifier)
  in a configurable directory.  Therefore, you are likely to encounter
  scalability problems as the number of active sessions increases, and
  this should primarily be considered a means to easily experiment.</p>

  <p>To configure this, add a <code>&lt;Store&gt;</code> nested inside
  your <code>&lt;Manager&gt;</code> element with the following attributes:
  </p>

  <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">checkInterval</code></td><td align="left" valign="center">
      <p>The interval (in seconds) between checks for expired sessions
      among those sessions that are currently swapped out.  By default,
      this interval is set to 60 seconds (one minute).</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">className</code></strong></td><td align="left" valign="center">
      <p>Java class name of the implementation to use.  This class must
      implement the <code>org.apache.catalina.Store</code> interface.  You
      <strong>must</strong> specify
      <code>org.apache.catalina.session.FileStore</code>
      to use this implementation.</p>
    </td></tr><tr><td align="left" valign="center"><code class="attributeName">directory</code></td><td align="left" valign="center">
      <p>Absolute or relative (to the temporary work directory for this web
      application) pathname of the directory into which individual session
      files are written.  If not specified, the temporary work directory
      assigned by the container is utilized.</p>
    </td></tr></table>


  <h5>JDBC Based Store</h5>

  <p>The <em>JDBC Based Store</em> implementation saves swapped out
  sessions in individual rows of a preconfigured table in a database
  that is accessed via a JDBC driver.  With large numbers of swapped out
  sessions, this implementation will exhibit improved performance over
  the File Based Store described above.</p>

  <p>To configure this, add a <code>&lt;Store&gt;</code> nested inside
  your <code>&lt;Manager&gt;</code> element with the following attributes:
  </p>

  <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">checkInterval</code></td><td align="left" valign="center">
      <p>The interval (in seconds) between checks for expired sessions
      among those sessions that are currently swapped out.  By default,
      this interval is set to 60 seconds (one minute).</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">className</code></strong></td><td align="left" valign="center">
      <p>Java class name of the implementation to use.  This class must
      implement the <code>org.apache.catalina.Store</code> interface.  You
      <strong>must</strong> specify
      <code>org.apache.catalina.session.JDBCStore</code>
      to use this implementation.</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">connectionURL</code></strong></td><td align="left" valign="center">
      <p>The connection URL that will be handed to the configured JDBC
      driver to establish a connection to the database containing our
      session table.</p>
    </td></tr><tr><td align="left" valign="center"><code class="attributeName">dataSourceName</code></td><td align="left" valign="center">
      <p>Name of the JNDI resource for a JDBC DataSource-factory. If this option
      is given and a valid JDBC resource can be found, it will be used and any
      direct configuration of a JDBC connection via <code>connectionURL</code>
      and <code>driverName</code> will be ignored. Since this code uses prepared
      statements, you might want to configure pooled prepared statements as
      shown in <a href="../jndi-resources-howto.html">the JNDI resources
      HOW-TO</a>.</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">driverName</code></strong></td><td align="left" valign="center">
      <p>Java class name of the JDBC driver to be used.</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionAppCol</code></strong></td><td align="left" valign="center">
      <p>Name of the database column, contained in the specified session
      table, that contains the Engine, Host, and Web Application Context
      name in the format <code>/Engine/Host/Context</code>.</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionDataCol</code></strong></td><td align="left" valign="center">
      <p>Name of the database column, contained in the specified
      session table, that contains the serialized form of all session
      attributes for a swapped out session.  The column type must accept
      a binary object (typically called a BLOB).</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionIdCol</code></strong></td><td align="left" valign="center">
      <p>Name of the database column, contained in the specified
      session table, that contains the session identifier of the
      swapped out session.  The column type must accept character
      string data of at least as many characters as are contained
      in session identifiers created by Tomcat (typically 32).</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionLastAccessedCol</code></strong></td><td align="left" valign="center">
      <p>Name of the database column, contained in the specified
      session table, that contains the <code>lastAccessedTime</code>
      property of this session.  The column type must accept a
      Java <code>long</code> (64 bits).</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionMaxInactiveCol</code></strong></td><td align="left" valign="center">
      <p>Name of the database column, contained in the specified
      session table, that contains the <code>maxInactiveInterval</code>
      property of this session.  The column type must accept a
      Java <code>integer</code> (32 bits).</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionTable</code></strong></td><td align="left" valign="center">
      <p>Name of the database table to be used for storing swapped out
      sessions.  This table must contain (at least) the database columns
      that are configured by the other attributes of this element.</p>
    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionValidCol</code></strong></td><td align="left" valign="center">
      <p>Name of the database column, contained in the specified
      session table, that contains a flag indicating whether this
      swapped out session is still valid or not.  The column type
      must accept a single character.</p>
    </td></tr></table>

  <p>Before attempting to use the JDBC Based Store for the first time,
  you must create the table that will be used to store swapped out sessions.
  Detailed SQL commands vary depending on the database you are using, but
  a script like this will generally be required:</p>

<div align="left"><table cellspacing="4" cellpadding="0" border="0"><tr><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr><tr><td bgcolor="#023264" width="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#ffffff" height="1"><pre>
create table tomcat_sessions (
  session_id     varchar(100) not null primary key,
  valid_session  char(1) not null,
  max_inactive   int not null,
  last_access    bigint not null,
  app_name       varchar(255),
  session_data   mediumblob,
  KEY kapp_name(app_name)
);
</pre></td><td bgcolor="#023264" width="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr><tr><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr></table></div>

  <p>In order for the JDBC Based Store to successfully connect to your
  database, the JDBC driver you configure must be visible to Tomcat's
  internal class loader.  Generally, that means you must place the JAR
  file containing this driver into the <code>$CATALINA_HOME/lib</code>
  directory.</p>

</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Special Features"><!--()--></a><a name="Special_Features"><strong>Special Features</strong></a></font></td></tr><tr><td><blockquote>


  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Persistence Across Restarts"><!--()--></a><a name="Persistence_Across_Restarts"><strong>Persistence Across Restarts</strong></a></font></td></tr><tr><td><blockquote>

    <p>Whenever Apache Tomcat is shut down normally and restarted, or when an
    application reload is triggered, the standard Manager implementation
    will attempt to serialize all currently active sessions to a disk
    file located via the <code>pathname</code> attribute.  All such saved
    sessions will then be deserialized and activated (assuming they have
    not expired in the mean time) when the application reload is completed.</p>

    <p>In order to successfully restore the state of session attributes,
    all such attributes MUST implement the <code>java.io.Serializable</code>
    interface.  You MAY cause the Manager to enforce this restriction by
    including the <code>&lt;distributable&gt;</code> element in your web
    application deployment descriptor (<code>/WEB-INF/web.xml</code>).</p>

  </blockquote></td></tr></table>

  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Disable Session Persistence"><!--()--></a><a name="Disable_Session_Persistence"><strong>Disable Session Persistence</strong></a></font></td></tr><tr><td><blockquote>

    <p>As documented above, every web application by default has
    standard manager implementation configured, and it performs session
    persistence across restarts. To disable this persistence feature, create
    a <a href="context.html">Context</a> configuration file for your web
    application and add the following element there:</p>

    <div align="left"><table cellspacing="4" cellpadding="0" border="0"><tr><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr><tr><td bgcolor="#023264" width="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#ffffff" height="1"><pre>&lt;Manager pathname="" /&gt;</pre></td><td bgcolor="#023264" width="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr><tr><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr></table></div>
  </blockquote></td></tr></table>

</blockquote></td></tr></table></td></tr><tr class="noPrint"><td width="20%" valign="top" nowrap class="noPrint"></td><td width="80%" valign="top" align="left"><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="comments_section" id="comments_section"><strong>Comments</strong></a></font></td></tr><tr><td><blockquote><p class="notice"><strong>Notice: </strong>This comments section collects your suggestions
              on improving documentation for Apache Tomcat.<br><br>
              If you have trouble and need help, read
              <a href="http://tomcat.apache.org/findhelp.html">Find Help</a> page
              and ask your question on the tomcat-users
              <a href="http://tomcat.apache.org/lists.html">mailing list</a>.
              Do not ask such questions here. This is not a Q&amp;A section.<br><br>
              The Apache Comments System is explained <a href="/tomcat-7.0-doc/comments.html">here</a>.
              Comments may be removed by our moderators if they are either
              implemented or considered invalid/off-topic.</p><script type="text/javascript"><!--//--><![CDATA[//><!--
              var comments_shortname = 'tomcat';
              var comments_identifier = 'http://tomcat.apache.org/tomcat-7.0-doc/config/manager.html';
              (function(w, d) {
                  if (w.location.hostname.toLowerCase() == "tomcat.apache.org") {
                      d.write('<div id="comments_thread"><\/div>');
                      var s = d.createElement('script');
                      s.type = 'text/javascript';
                      s.async = true;
                      s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
                      (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
                  }
                  else {
                      d.write('<div id="comments_thread"><strong>Comments are disabled for this page at the moment.<\/strong><\/div>');
                  }
              })(window, document);
              //--><!]]></script></blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font color="#525D76" size="-1"><em>
        Copyright &copy; 1999-2013, Apache Software Foundation
        </em></font></div></td></tr></table></body></html>